Alpha AlphaCellTM SMU-C User Manual
AlphaCellTM SMU-C Series Batteries
Technical Manual
Effective: December 2010
AlphaCellTM SMU-C Series Batteries
Technical Manual
745-680-B11-001 Rev. A
Effective Date: December, 2010
Copyright © 2010
Alpha Technologies, Inc.
member of The Group
NOTE:
Photographs contained in this manual are for illustrative purposes only. These photographs may not match
your installation.
NOTE:
Operator is cautioned to review the drawings and illustrations contained in this manual before proceeding. If
there are questions regarding the safe operation of this product, please contact Alpha Technologies or your
nearest Alpha representative.
NOTE:
Alpha shall not be held liable for any damage or injury involving its enclosures, power supplies, generators,
batteries, or other hardware if used or operated in any manner or subject to any condition not consistent with
its intended purpose, or is installed or operated in an unapproved manner, or improperly maintained.
TM
Contacting Alpha Technologies: www.alpha.com
OR
For general product information and customer service (7 AM to 5 PM, Pacic Time), call
1-800-863-3930,
For complete technical support, call
1-800-863-3364
7 AM to 5 PM, Pacic Time or 24/7 emergency support
745-680-B11-001, Rev. A
3
Table of Contents
Safety Notes .......................................................................................................................... 6
Battery Safety Notes.............................................................................................................. 7
1.0 Introduction ................................................................................................................. 8
1.1 Features ........................................................................................................... 8
1.2 Typical Electrical and Mechanical Specications ............................................. 9
1.3 Operating Conditions ..................................................................................... 10
1.4 Capacity ......................................................................................................... 10
1.5 Temperature and Battery Life..........................................................................11
1.6 Internal Resistance and Short-circuit Current .................................................11
2.0 Charging Procedures ................................................................................................ 12
2.1 General Charge ............................................................................................. 12
2.2 Floating Charge ............................................................................................. 13
2.3 Discharge ....................................................................................................... 13
3.0 Storage ..................................................................................................................... 14
4.0 Maintenance ............................................................................................................. 15
4.1 Recommended Maintenance Tasks ............................................................... 15
5.0 Discharge Specications .......................................................................................... 17
5.1 Discharge Data with Constant Current .......................................................... 17
5.2 Discharge Data with Constant Power ............................................................ 23
6.0 Forms ........................................................................................................................29
6.1 Discharge Recording Form ............................................................................ 29
4
745-680-B11-001, Rev. A
Figures
Fig. 1-1, Available Capacity vs. Ambient Temperature ........................................................ 10
Fig. 2-1, Charge Characteristics Curve ............................................................................... 12
Fig. 3-1, Capacity vs. Storage Time .................................................................................... 14
Fig. 4-1, VRLA Battery Regular Maintenance Record ......................................................... 16
Tables
Table 1-1, General Electrical and Mechanical Specications by Model ................................ 9
Table 1-2, Internal Resistance and Short Circuit Current at 77ºF (25ºC).............................11
Table 2-1, Floating Voltage at Different Temperatures.........................................................13
Table 2-2, Discharge End-Voltage ....................................................................................... 13
745-680-B11-001, Rev. A
5
Safety Notes
Review the drawings and illustrations contained in this manual before proceeding. If there are any questions
regarding the safe installation or operation of the system, contact Alpha Technologies or the nearest Alpha
representative. Save this document for future reference.
To reduce the risk of injury or death, and to ensure the continued safe operation of this product, the following
symbols have been placed throughout this manual. Where these symbols appear, use extra care and
attention.
ATTENTION:
The use of ATTENTION is only for specic regulatory/code requirements that may affect the placement of
equipment and installation procedures.
NOTE:
A NOTE gives readers additional information to help them complete a specic task or procedure.
CAUTION!
The use of CAUTION indicates safety information intended to PREVENT DAMAGE to material or
equipment.
WARNING!
WARNING presents safety information to PREVENT INJURY OR DEATH to the technician
or user.
6
745-680-B11-001, Rev. A
Battery Safety Notes
WARNING!
Lead-acid batteries contain dangerous voltages, currents and corrosive material. Battery
installation, maintenance, service and replacement must be performed only by authorized
personnel.
Chemical Hazards
Any gelled or liquid leakage from a valve-regulated lead-acid (VRLA) battery contains dilute sulfuric acid,
which is harmful to the skin and eyes. Emissions are electrolytic, and are electrically conductive and
corrosive.
To avoid injury:
Servicing and connection of batteries shall be performed by, or under the direct supervision of, personnel •
knowledgeable of batteries and the required safety precautions.
Always wear eye protection, rubber gloves, and a protective vest when working near batteries. Remove all metallic •
objects from hands and neck.
Batteries produce explosive gases. Keep all open ames and sparks away from batteries.•
Use tools with insulated handles, do not rest any tools on top of batteries.•
Lead-acid batteries contain or emit chemicals known to the State of California to cause cancer and birth defects or •
other reproductive harm. Battery post terminals and related accessories contain lead and lead compounds. Wash
hands after handling (California Proposition 65).
Wear protective clothing (insulated gloves, eye protection, etc.) when installing, maintaining, servicing, or replacing •
batteries.
If any battery emission contacts the skin, wash immediately and thoroughly with water. Follow your company’s •
approved chemical exposure procedures.
Neutralize any spilled battery emission with the special solution contained in an approved spill kit or with a solution •
of one pound bicarbonate of soda to one gallon of water. Report a chemical spill using your company’s spill reporting
structure and seek medical attention if necessary.
Always replace batteries with those of an identical type and rating. Never install old or untested batteries.•
Do not charge batteries in a sealed container. Each individual battery should have at least 0.5 inches of space •
between it and all surrounding surfaces to allow for convection cooling.
All battery compartments must have adequate ventilation to prevent accumulation of potentially dangerous gas. •
Ventilation should prevent trapped hydrogen gas pockets from exceeding a 1% concentration as per regulation 70E
of the National Fire Protection Agency (NFPA).
Prior to handling the batteries, touch a grounded metal object to dissipate any static charge that may have developed •
on your body.
Never use uninsulated tools or other conductive materials when installing, maintaining, servicing, or replacing •
batteries.
Use special caution when connecting or adjusting battery cabling. An improperly connected battery cable or an •
unconnected battery cable can make contact with an unintended surface that can result in arcing, re, or possible
explosion.
A battery showing signs of cracking, leaking, or swelling should be replaced immediately by authorized personnel •
using a battery of identical type and rating.
Equipment Cautions
Do not operate NiCd and lead-acid batteries in the same room. NiCd emissions will neutralize the lead-acid solution, •
rendering the battery useless.
Overcharging the battery can result in a loss of capacity and excess release of gas.•
Recycling and Disposal Instructions
Spent or damaged batteries are considered environmentally unsafe. Always recycle used batteries or dispose of the
batteries in accordance with all federal, state and local regulations.
745-680-B11-001, Rev. A
7
1.0 Introduction
The SMU-C series of Valve Regulated Lead Acid (VRLA) batteries is designed to meet the needs of
modern electronic equipment. The success of the AlphaCell SMU-C series is due to a product design
purpose-built for the needs of critical backup requirements, and an industry-leading manufacturing
technology which delivers product consistency. Safety, reliability, and long service life in standby
applications are the result.
1.1 Features
Require no additional water throughout their life cycle, reducing maintenance costs. •
Specically designed to meet the requirements of modern electronic equipment. •
Compatible with commonly available recharging systems.•
Compact construction and excellent performance at high rates of discharge provide big •
savings in volume and weight compared to conventional vented batteries.
SMU-C batteries offer substantial savings in installation and maintenance costs •
compared to conventional vented batteries. No specically designed rooms are required
and only minimal maintenance is needed during the life of the battery.
Smaller, more compact, and lighter than traditional batteries, SMU-C batteries are •
supplied lled and charged so they can be immediately installed directly into cabinets or
on easily assembled racks (also available from Alpha).
With a minimum 10 year design life, the SMU-C batteries are highly reliable and fully •
comply with established international standards. The SMU-C range has been fully tested
with respect to charge and discharge characteristics, cycle life, recombination efciency,
mechanical strength, vibration life, and ame retardancy.
8
745-680-B11-001, Rev. A
1.2 TypicalElectricalandMechanicalSpecications
Type
SMU-C 6-4.5 6 4.5 14.6 2.76 x 1.85 x 4.21 / 70 x 47 x 107 1.8 / .82
SMU-C 6-7 6 8.0 32.4 5.94 x 1.34 x 3.94 / 151 x 34 x 100 3.0 / 1.4
SMU-C 6-12 6 13.2 54.1 5.94 x 1.97 x 3.94 / 151 x 50 x 100 4.2 / 1.9
SMU-C 12-4.5 12 4.5 14.6 3.54 x 2.76 x 4.21 / 90 x 70 x 107 3.7 / 1.7
SMU-C 12-7 12 8.0 32.4 5.94 x 2.56 x 3.98 / 151 x 65 x 101 5.6 / 2.5
SMU-C 12-12 12 13.2 54.1 5.94 x 3.86 x 3.98 / 151 x 98 x 101 8.8 / 4.0
SMU-C 12-14 12 14.0 56.0 5.94 x 3.86 x 3.98 / 151 x 98 x 101 9.3 / 4.2
SMU-C 12-18 12 20 73.7 7.13 x 3.03 x 6.57 / 181 x 77 x 167 13.2 / 6.0
SMU-C 12-26 12 28 98.3 6.89 x 6.54 x 4.92 / 175 x 166 x 125 19.6 / 8.9
SMU-C 12-28 12 28 98.3 6.50 x 4.96 x 7.17 / 165 x 126 x 182 18.7 / 8.5
SMU-C 12-30 12 30 98.3 6.57 x 4.96 x 6.93 / 167 x 126 x 176 22.5 / 10.2
SMU-C 12-35 12 35 138 7.68 x 5.12 x 7.09 / 195 x 130 x 180 23.2 / 10.5
SMU-C 12-40 12 41 152 7.76 x 6.50 x 6.69 / 197 x 165 x 170 30.2 / 13.7
SMU-C 12-55 12 56 197 9.02 x 5.43 x 8.98 / 229 x 138 x 228 37.5 / 17.0
SMU-C 12-65 12 66 231 13.98 x 6.58 x 7.21 / 355 x 167 x 183 50.0 / 22.7
SMU-C 12-75 12 76 265 10.16 x 6.61 x 8.90 / 258 x 168 x 226 50.7 / 23.0
SMU-C 12-90 12 92 305 12.01 x 6.61 x 8.90 / 305 x 168 x 226 63.7 / 28.9
SMU-C 12-100 12 102 364 12.99 x 6.77 x 8.70 / 330 x 172 x 221 68.3 / 31.0
SMU-C 12-120 12 122 438 15.94 x 6.89 x 9.25 / 405 x 175 x 235 83.8 / 38.0
SMU-C 12-134 12 136 381 13.43 x 6.77 x 11.34 / 341 x 172 x 288 93.7 / 42.5
SMU-C 12-150 12 154 546 19.09 x 6.77 x 9.45 / 485 x 172 x 240 99.2 / 45.0
SMU-C 12-200 12 202 568 20.55 x 9.37 x 9.29 / 522 x 238 x 236 134.5 / 61.0
Normal
Voltage
(V)
Rated
Capacity
C20 (Ah)
Rated Power
(15min, 1.75V, W)
Dimensions
L x W x H (in/mm)
WT
(lb/kg)
Table 1-1, General Electrical and Mechanical Specications by Model
(Specications courtesy of manufacturer)
TorqueSpecication
Torque specications are 8.0Nm (75lbf-in). Torque all terminal connections to the
specied value. Improper torquing can result in loose connections or damaged
terminals.
745-680-B11-001, Rev. A
9
1.0 Introduction, continued
-40-30 -20-10 0102030405060
0
20
40
60
80
100
1.3 Operating Conditions
Because SMU-C batteries, which are valve regulated and virtually sealed, do not give off
perceptible amounts of gas under normal operating conditions, they can be installed in the
same environment where people live and work.
Acceptable ambient operating temperature: -40ºF to 131ºF (-40ºC to 55ºC)•
Ideal ambient operating temperature: 68ºF to 77ºF (20ºC to 25ºC)•
Ambient humidity: ≤ 95%•
Operating room or area: ventilated and not fully sealed •
1.4 Capacity
Battery capacity is rated in Ampere hours (Ah) and is the quantity of electricity that can be
supplied during discharge (See Table 1-1).
The actual capacity is related to the utilization ratio of the active positive and negative
materials within the battery. The utilization ratio is inuenced by the depth of discharge, the
structure of the battery, and the manufacturing technology. During normal usage, the factors
that inuence the actual capacity are discharge rate, depth of discharge, end voltage, and
temperature.
The higher the discharge rate, the lower the available capacity.•
As batteries get colder, the available capacity is reduced. This is related to the kinetics of •
the electrochemical reactions and the resistivity of the electrolyte (See Fig. 1-1).
NOTE:
Although the battery can be operated at temperatures below 5ºF (-15ºC), the capacity and ability to
discharge will be dramatically decreased. Similarly, temperatures approaching 122ºF (50ºC) will increase
water loss and corrosion of the plates, resulting in a shorter battery life.
Capacity (%)
Ambient Temperature (ºC)
Fig. 1-1, Available Capacity vs. Ambient Temperature
10
745-680-B11-001, Rev. A
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